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Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1549103009

Certificate GIA 1549103009

Diamond specifications and retailer prices

From $24,605 USD
As of October 25, 2026
Save $14,611 USD (37%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $39,216 USD at Cape Diamonds · As of October 27, 2026
View at Cape Diamonds

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1549103009. Listed at 13 retailers as of October 25, 2026, with prices from $24,605 to $39,216, a $14,611 spread on the same certified stone. Cape Diamonds lists it at $39,216. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.51
Carat
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1549103009
Dimensions8.94 × 8.88 × 5.21 mm
L/W Ratio1.01
Girdle conditionMedium
Key to symbols
Cloud, Feather, Crystal, Needle
Top View
8.94 mm8.88 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1549103009
Side View
Table 61.0%Crown 32.5°Girdle: MediumPavilion 41°Culet: NoneDepth 58.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 25
Current: $39,216 USD|Low: $24,605 USD|High: $43,343 USD|Avg: $31,378 USD|+1.4%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 31, 2026
Retailer 12$24,605 USD
Retailer 13$24,875 USD
Retailer 2$26,447 USD
Retailer 7$26,463 USD
Retailer 4$26,930 USD
Retailer 10$28,715 USD
Retailer 5$28,870 USD
Retailer 11$29,048 USD
Retailer 8$30,783 USD
Retailer 3$33,142 USD
Retailer 9$33,534 USD
Retailer 6$38,898 USD
Cape Diamonds$39,216 USD
Retailer 14$43,285 USD

35 data points across 14 retailers

13 retailers$24,605 USD to $39,216 USD

B+
Cheapest Retailer
-
$24,605 USD
B+
Retailer 2
-
$24,875 USD
View
B+
Retailer 3
-
$26,447 USD
₹2,518,729 INR
View
B
Retailer 4
-
$26,463 USD
View
B+
Retailer 5
-
$27,070 USD
A$41,646 AUD
View
B
Retailer 6
-
$28,715 USD
View
Retailer 7
-
$28,715 USD
View
Price last confirmed 10 days ago
Retailer 8
-
$28,870 USD
View
Price last confirmed 42 days ago
B
Retailer 9
-
$29,048 USD
View
B
Retailer 10
-
$30,783 USD
£24,239 GBP
View
Retailer 11
-
$33,142 USD
View
Price last confirmed 38 days ago
B
Retailer 12
-
$33,534 USD
€31,937 EUR
View
Most Expensive
B
Cape Diamonds
cert_1549103009 · Oct 27
$39,216 USD
ZAR 633,536 ZAR
View
12 more retailers have this diamond
Prices start from $24,605 USDSave up to $14,611 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
2.51ct Round
$24,605 USD